'Style "Default" Links' is not a pro tip about css-protips

[sentience]

a (and a:link, a:visited) matches all links, whether they have a class attribute or not.

a[href]:not([class]) matches only links with no class attribute. This is often preferable because you can assign specific styles for those “ordinary” links without having to then override those styles to remove them from your “specialized” (classed) link styles.

For example, if you wanted your class-less links to be bold, but your classed links to be normal, you could write:

a { font-weight: bold; }
a.someclass { font-weight: normal; }
a.anotherclass { font-weight: normal; }
a.thirclass { font-weight: normal; }

…or you could just write this one rule:

a[href]:not([class]) { font-weight: bold; }

Note: If you aren’t concerned about a elements that aren’t links (i.e. old-school <a name> anchors), then you can omit the [href] and go for a:not([class]).

[fabian-mcfly]

Mind giving some real examples and not some constructed, theoretical stuff?
If dropping IE < 9 support is considered a "pro tip", then I happily stay non-pro.

And I just don't get the whole reasoning behind this collection of tips.
Reducing multiple resets to "default"-styles is the only justification for this "tip" to be valid; while the lobotomized owl selector forces you to reset the top margin all the time if you don't need it. That's just inconsistent reasoning.